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From: Tim Rentsch <tr.17687@z991.linuxsc.com>
Newsgroups: comp.lang.c++
Subject: Re: Is EXIT_SUCCESS/EXIT_FAILURE necessary?
Date: Sun, 01 Dec 2024 21:00:20 -0800
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Keith Thompson <Keith.S.Thompson+u@gmail.com> writes:

> Keith Thompson <Keith.S.Thompson+u@gmail.com> writes:
> [...]
>
>> In my opinion, the main reason for NULL is that it lets the
>> programmer explicitly state that it's a null pointer constant and
>> not just zero.  (But NULL can still be of type int.)  I find
>> nullptr (in C++ and C23) an improvement over NULL.
>
> To summarize, the purpose of using NULL rather than 0 is to
> communicate information to the human reader, [...]

That is one purpose for using NULL, but it doesn't have to
be the only one.